Who are considered the "5th Generation" of NJPW wrestlers!

If Nagata, Tenzan, Kojima, and Nakanishi are the 3rd gen, and Tanahashi and Nakamura and Shibata were the 4th gen, then who would be considered the 5th gen?

I think the obvious ones are Naito, Okada and YOSHI-HASHI, but who else?